Lib "user32" Indicates that the SetSysColor function is present in the User32.dll

Then the argumants are listed in brackets

If you were to use the exact same declaration inside VB.NET, you would notice that it is acceptable.

Q: But, is it really?

A: Well, it should logically work, but you may not always get away with this declaration inside VB.NET

Q: Why?

A: The major headache would be the datatypes. Sometime an API would be declared using Integers and it will not work properly. In this article, I've outlined the Unmanaged types. In VB 6, we could have used a Long type variable to hold the value of a Window's handle, in VB.NET we must and should use the IntPtr type variable.